Add 'submodules/AsyncDisplayKit/' from commit '02bedc12816e251ad71777f9d2578329b6d2bef6'

git-subtree-dir: submodules/AsyncDisplayKit
git-subtree-mainline: d06f423e0e
git-subtree-split: 02bedc1281

submodules/AsyncDisplayKit/examples/PagerNode/Sample/ViewController.m

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+//
+//  ViewController.m
+//  Texture
+//
+//  Copyright (c) Facebook, Inc. and its affiliates.  All rights reserved.
+//  Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc.  All rights reserved.
+//  Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
+//
+
+#import "ViewController.h"
+
+#import <AsyncDisplayKit/AsyncDisplayKit.h>
+
+#import "PageNode.h"
+
+static UIColor *randomColor() {
+  CGFloat hue = ( arc4random() % 256 / 256.0 );  //  0.0 to 1.0
+  CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5;  //  0.5 to 1.0, away from white
+  CGFloat brightness = ( arc4random() % 128 / 256.0 ) + 0.5;  //  0.5 to 1.0, away from black
+  return [UIColor colorWithHue:hue saturation:saturation brightness:brightness alpha:1];
+}
+
+@interface ViewController () <ASPagerNodeDataSource>
+
+@end
+
+@implementation ViewController
+
+- (instancetype)init
+{
+  self = [super initWithNode:[[ASPagerNode alloc] init]];
+  if (self == nil) {
+    return self;
+  }
+
+  self.title = @"Pages";
+  self.node.dataSource = self;
+  
+  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Next" style:UIBarButtonItemStylePlain target:self action:@selector(scrollToNextPage:)];
+  self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Previous" style:UIBarButtonItemStylePlain target:self action:@selector(scrollToPreviousPage:)];
+  self.automaticallyAdjustsScrollViewInsets = NO;
+  return self;
+}
+
+#pragma mark - Actions
+
+- (void)scrollToNextPage:(id)sender
+{
+  [self.node scrollToPageAtIndex:self.node.currentPageIndex+1 animated:YES];
+}
+
+- (void)scrollToPreviousPage:(id)sender
+{
+  [self.node scrollToPageAtIndex:self.node.currentPageIndex-1 animated:YES];
+}
+
+#pragma mark - ASPagerNodeDataSource
+
+- (NSInteger)numberOfPagesInPagerNode:(ASPagerNode *)pagerNode
+{
+  return 5;
+}
+
+- (ASCellNodeBlock)pagerNode:(ASPagerNode *)pagerNode nodeBlockAtIndex:(NSInteger)index
+{
+  return ^{
+    PageNode *page = [[PageNode alloc] init];
+    page.backgroundColor = randomColor();
+    return page;
+  };
+}
+
+@end